DanielDaniel and now SwedFTP (with DNS records from TheButterZone) have kindly setup a 100-user Mumble server for use by the Bitcoin community. It's had >99% uptime since Jan 6 2013.
Mumble is a group voice chat similar to TeamSpeak, except it is open source software. Mumble can be obtained from http://wiki.mumble.info/wiki/Main_Page
and is available for all major platforms.
Also, iOS and Droid, free:https://itunes.apple.com/us/app/mumble/id443472808?mt=8https://play.google.com/store/apps/details?id=com.morlunk.mumbleclient.freeIf you want to talk, you will need to idle just like on IRC, to wait for people to join the server/become active. If you're just going to connect, then impatiently disconnect after a few minutes, please don't connect in the first place. Thank you. P.S. If you want to use TeamSpeak instead, go to ts.whaleclub.io